Physicochemical characterization and thermal properties of lipids from R. opacus PD630.
Year: 2014
Type: article
Abstract: Physicochemical properties of lipid from R. opacus PD630 were studied along with positional distribution of triacylglycerol fatty acids and thermal properties of the oil. Results showed that saturated fatty acids (SFA) contribute a large portion (51.50 ± 0.49%) of total fatty acids. A high proportion of fatty acids with an odd number of carbon atoms (32.08 ± 0.39%) were also detected. The lipid was high in red and yellow colour parameters and contained a high level of unsaponifiable matter. It was oxidatively stable and had good quality based on its moisture and volatile content, peroxide value, p-anisidine value, TOTOX value, conjugated diene and triene values, free fatty acid and acid values. The SFA (70.56 ± 1.95%) were enriched at sn-2 position against sn-1,3 position while unsaturated fatty acids were predominantly found at sn-1,3 position. The melting and crystallization of lipid from R. opacus PD630occurredover a large temperature range from -7.45°C to 32.37°C and 17.62°C to -19.93°C respectively, due to its high degree of saturation. Lipids from R. opacus PD630 decomposed in four stages during programmed heating, comprising decomposition of unsaponifiable matter, monounsaturated fatty acids (MUFA) and SFA degradation, followed by decomposition of MUFA and SFA degradation products. Based on the data, lipid from R. opacus PD630 can be considered as a good quality oil and is thermally stable.
Source: Food and public health
Authors: Shuo Yang, Robin S. Simmonds, E. John Birch
Institution: University of Otago
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W1563193215